It was proved in  that distribution of aliphatic and aromatic hydrocarbons, hetero-compounds and asphaltenes
was affected by polarity of solvents.
But when the temperature gets above 350 degrees, the high-molecular-weight hydrocarbons, the resins and asphaltenes
, undergo a series of cracking and condensation reactions to form solid char, similar to the petroleum coke produced in refineries.
Select products within the ParaFlow line of products are migratory and will help keep paraffin wax and asphaltenes
in suspension from wellhead to refinery and can also lower the B.
High viscosity and density of EVO, small density difference between oil and water, a high degree of the aqueous phase dispersion, high content of resins and asphaltenes
in the oil, which are natural stabilizers, make the EVO emulsion highly resistant to destruction.
Anomalies of holmium (Ho) in the REE composition of asphaltenes
As a consequence, oxidation hardening of BIT is observed; polar compounds react and covert to asphaltenes
The study results have showed that the amount of asphaltenes
in bitumen changes insignificantly, some accumulation of aromatic hydrocarbons occurs (Fig.
The chemical composition of bitumen is extremely complex; therefore, when conducting experimental investigations it is divided into two main fractions called asphaltenes
Routine pigging also removes contaminants associated with wet gas, including paraffin, asphaltenes
, iron oxides, water, hydrogen sulfide and carbon dioxide.
high tendency to coke), high asphaltenes
, sulphur and heavy metal content (Weissman, et al.
Oxidation causes the oils to convert to resins and the resins to asphaltenes
(Noureldin, Wood 1989).
A possibility could be a near borehole build up of asphaltenes